code: def get_parser():
      parser = argparse.ArgumentParser(
          description="Compute cepstral mean and "
          "variance normalization statistics"
          "If wspecifier provided: per-utterance by default, "
          "or per-speaker if"
          "spk2utt option provided; if wxfilename: global",
          formatter_class=argparse.ArgumentDefaultsHelpFormatter,
      )
      parser.add_argument(
          "--spk2utt",
          type=str,
          help="A text file of speaker to utterance-list map. "
          "(Don't give rspecifier format, such as "
          '"ark:utt2spk")',
      )
      parser.add_argument(
          "--verbose", "-V", default=0, type=int, help="Verbose option"
      )
      parser.add_argument(
          "--in-filetype",
          type=str,
          default="mat",
          choices=["mat", "hdf5", "sound.hdf5", "sound"],
          help="Specify the file format for the rspecifier. "
          '"mat" is the matrix format in kaldi',
      )
      parser.add_argument(
          "--out-filetype",
          type=str,
          default="mat",
          choices=["mat", "hdf5", "npy"],
          help="Specify the file format for the wspecifier. "
          '"mat" is the matrix format in kaldi',
      )
      parser.add_argument(
          "--preprocess-conf",
          type=str,
          default=None,
          help="The configuration file for the pre-processing",
      )
      parser.add_argument(
          "rspecifier",
          type=str,
          help="Read specifier for feats. e.g. ark:some.ark",
      )
      parser.add_argument(
          "wspecifier_or_wxfilename",
          type=str,
          help="Write specifier. e.g. ark:some.ark",
      )
      return parser
  
file_path: espnet/utils/compute-cmvn-stats.py
imports: import argparse
  import logging
  import kaldiio
  import numpy
  from espnet.transform.transformation import Transformation
  from espnet.utils.cli_readers import file_reader_helper
  from espnet.utils.cli_utils import get_commandline_args, is_scipy_wav_style
  from espnet.utils.cli_writers import file_writer_helper
label_desc: Use image node_id 1 for calling a global function with example usage: get_parser() and returns: parser